文献类型：期刊文献

英文题名：Reduced Graphene Oxide Membrane for Gold Extraction from Electronic Waste

作者：Wu, Mengjiao[1];Lei, Xiaoling[1];Zhang, Fanshu[2];Qiang, Yu[2];Sun, Yan[1];Yan, Zhengqing[1];Jia, Junlin[1];Fang, Haiping[1,3]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai Key Lab Atom Control & Applicat Inorgan S, Shanghai 200237, Peoples R China;[2]Guangxi Normal Univ, Sch Phys Sci & Technol, Guilin 541001, Peoples R China;[3]Zhejiang Univ, Sch Phys, Hangzhou 310027, Peoples R China

年份：2026

卷号：130

期号：1

起止页码：620

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20260219876263);WOS:【SCI-EXPANDED(收录号:WOS:001647719400001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 12435001), the Natural Science Foundation of Shanghai, China (No. 23JC1401400), and the Fundamental Research Funds for the Central Universities of East China University of Science and Technology.

语种：英文

外文关键词：Activation energy - Defects - Electronic equipment - Electronic Waste - Gold - Graphene - Membranes - Metal ions - Negative ions - Reduced Graphene Oxide - Structural optimization - Wastes

摘要：Graphene-based laminar membranes open new avenues for recovering gold from electronic waste. In this work, we used reduced graphene oxide membranes (rGOMs) as a model system to elucidate how thermal reduction-induced structural changes enhance the gold extraction performance. Interestingly, the rGOM prepared at 180 degrees C (rGOM-180) exhibits dual interlayer spacings (7.20 and 3.82 & Aring;) and high-density structural defects, leading to optimal gold adsorption capacity. The dual interlayer spacings of rGOM-180 effectively lower the activation energy required for ion migration into narrow interlayer spacings. The high-density structural defects not only strengthen the cation-pi interactions between gold ions and rGOM sheets but also act as electron donors, reducing Au3+ to Au0. These facilitate the adsorption of more gold ions on both the inner and outer surfaces of the rGOM. Our work offers important insights into manipulating membrane structures for enhanced gold extraction performance at the nanoscale.